It's hard to tell. But even if it's trolling, it's not funny. (I think the Flat Earth stuff started off as trolling, IIRC.)

Looking around, he seems to be sincere (or at least is fighting for clicks and visibility for his company). It looks like nothing he has "published" has been peer-reviewed (unsurprisingly).

https://en.wikipedia.org/wiki/Michelson%E2%80%93Morley_experiment

Michelson–Morley type experiments have been repeated many times with steadily increasing sensitivity. These include experiments from 1902 to 1905, and a series of experiments in the 1920s. More recently, in 2009, optical resonator experiments confirmed the absence of any aether wind at the 10−17 level.[2][3] Together with the Ives–Stilwell and Kennedy–Thorndike experiments, Michelson–Morley type experiments form one of the fundamental tests of special relativity theory.[A 3]

M-M spent a long time, with some amazing hardware for the time, to try to find the aether this guy is talking about, and didn't find it.

He seems to be making some elementary mistakes and ignoring the fact that SR is about the most successful physical theory there is.

Cheers,
Scott.